The attack on Pearl Harbor was a major turning point in history. The Japanese surprise attacked them in the morning and that wasn't fair and the United States didn't think that it was fair anymore then I did, but the president of the United States took charge and declared that they will now be part of World War II. This is a big turning point because this turned the tides of WWII. The United States have joined forces with France and Britain to take out the forces of Germany and Japan and also Italy and the attack on Pearl Harbor sparked the war out of the United States to enter WWII.